Lanna language
Thai language related to standard Thai and Lao
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Through 6th century
Speakers of this language generally consider the name "Tai Yuan" to be pejorative. They refer to themselves as Khon Mueang (ᨤᩫ᩠ᨶᨾᩮᩬᩥᨦ, คนเมือง, – literally "people of Mueang" meaning "city dwellers"), Lanna, or Northern Thai. The language is also sometimes referred to as Phayap (พายัพ, Thai pronunciation: ), "Northwestern (speech)".
The term Yuan is still sometimes used for Lanna's distinctive Tai Tham alphabet, which is closely related to the old Tai Lue alphabet and the Lao religious alphabets. The use of the Tua Mueang, as the traditional alphabet is known, is now largely limited to Buddhist temples, where many old sermon manuscripts are still in active use. There is no active production of literature in the traditional alphabet, and when used in writing standard Thai script is invariably used. The modern spoken form is called Kam Mueang. There is a resurgence of interest in writing it in the traditional way, but the modern pronunciation differs from that prescribed in spelling rules.
Classification
Lanna is classified as one of the Chiang Saen branch, a model popularized by foundational linguists such as Fang-Kuei Li (1960) and Marvin Brown (1965), others being Thai, Southern Thai and numerous smaller languages, which together with the Northwestern Tai and Lao-Phutai languages, form the Southwestern branch of Tai languages. The Tai languages are a branch of the Kra–Dai language family, which encompasses a large number of indigenous languages spoken in an arc from Hainan and Guangxi south through Laos and Northern Vietnam to the Cambodian border.
From a purely genealogical standpoint, most linguists consider Lanna to be more closely related to Central Thai than to Lao or Isan, but the language has been heavily influenced by both Lao and Central Thai throughout history. All Southwestern Tai languages form a coherent dialect continuum of more or less mutually intelligible varieties, with few sharp dividing lines. However, this genealogical classification is increasingly contested by modern scholars. Critics argue that these groupings may reflect political "Thaification" and a drive for national unity rather than purely linguistic history. While the Chiang Saen group (including Central Thai, Northern Thai, and Southern Thai) is the standard model, it often masks the closer historical ties Lanna has with the Lao-Phutai branch. Nevertheless, Lanna has today become closer to the Central Thai language, as Standard Thai is the principal language of education and government and spoken throughout Thailand.
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Names
The Lanna language has various names in Northern Thai, Thai, and other Tai languages.
- In Northern Thai, it is commonly called kam mueang (ᨣᩴᩤᨾᩮᩬᩥᨦ กำเมือง, , literally "city language"; cf. Standard Thai: คำเมือง ), or phasa Lanna (ᨽᩣᩈᩣᩃ᩶ᩣ᩠ᨶᨶᩣ, ภาษาล้านนา , literally "the language of Lanna").
- In Central Thai and Southern Thai, Lanna is known as phasa thin phayap (ภาษาถิ่นพายัพ , literally "the language of the northwestern region"), or phasa thai thin nuea (ภาษาไทยถิ่นเหนือ , literally "the Thai language of the northern region", or colloquially it is known as phasa nuea (ภาษาเหนือ , literally "the northern language").
- In Lao, it is known as phasa nyuan or phasa nyon (ພາສາຍວນ or ພາສາໂຍນ respectively, or respectively, literally "the Tai Yuan language").
- In Tai Lü, it is known as kam yon (ᦅᧄᦍᦷᧃ , literally "the Tai Yuan language").
- In Shan it is known as kwam yon (ၵႂၢမ်းယူၼ်း , literally "the Tai Yuan language").
History
Tai migration
The ancestors of the Lanna people were speakers of Southwestern Tai dialects that migrated from what is now southeastern China, specifically what is now Guangxi and northern Vietnam where the diversity of various Tai languages suggests an Urheimat. The Southwestern Tai languages began to diverge from the Northern and Central branches of the Tai languages, covered mainly by various Zhuang languages, sometime around 112 AD, but likely completed by the sixth century. Due to the influx of Han Chinese soldiers and settlers, the end of the Chinese occupation of Vietnam, the fall of Jiaozhi and turbulence associated with the decline and fall of the Tang dynasty led some of the Tai peoples speaking Southwestern Tai to flee into Southeast Asia, with the small-scale migration mainly taking place between the eighth and twelfth centuries. The Tais split and followed the major river courses, with the ancestral Lanna originating in the Tai migrants that followed the Mekong River.
Indianized kingdoms
Ancestors of the Lanna people established Ngoenyang, an early kingdom that existed between the 7th to 13th centuries, as well as smaller kingdoms like Phayao, in what is now modern-day northern Thailand. They settled in areas adjacent to the kingdom of Hariphunchai, coming into contact with Mon-speaking people whose writing system was eventually adapted for the Lanna language as the Tai Tham script. In the 13th century, King Mangrai consolidated control of these territories, establishing the kingdom of Lan Na. In the 15th century, King Tilokkarat ushered in a golden age for Northern Thai literature, with a profusion of palm leaf manuscripts written in Tai Tham, using vernacular Lanna and interspersed with Pali and Buddhist Indic vocabulary.
Thai subordination
In 1775, Kawila of Lampang revolted with Siamese assistance, and captured the city, ending 200 years of Burmese rule. Kawila was installed as the prince of Lampang and Phraya Chaban as the prince of Chiang Mai, both as vassals of Siam. In 1899, Siam annexed the Northern Thai principalities, effectively dissolving their status as sovereign tributary states.
The Compulsory Education Act of 1921 banned schools and temples from using languages other than Central Thai (standard Thai), in an effort to bring remote regions under Siamese control. Lanna was relegated from the public sphere, with influential religious leaders like Khruba Srivichai jailed for using Lanna in sermons. In the 1940s, authorities promulgated Thai cultural mandates that reinforced the importance of learning and using Central Thai as the prestige language.
These economic and educational pressures have increased the use of standard Thai to the detriment of other regional languages like Lanna. Today, Lanna is typically code-switched with standard Thai, especially in more developed and urbanized areas of Northern Thailand, whereas exclusive use of Lanna remains prevalent in more remote areas.
Dialects
Thanajirawat (2018) classifies Tai Yuan into five major dialect groups based on tonal split and merger patterns. (See also Proto-Tai language#Tones)
- most Tai Yuan varieties in Thailand, Laos and Myanmar
- Bokeo Province, Laos (A12-34 and BCD123-4 (B4=DL4=DS4))
- Mae Chaem District, Chiang Mai Province and Laplae District, Uttaradit Province, Thailand (A12-34 and BCD123-4 (A34=B123=DL123))
- Tha Pla District, Uttaradit Province and Xayaburi Province, Laos (A12-34, BDL1234, and CDS123-4)
- Ratchaburi Province, Thailand (A12-34 and BCD123-4 (A34=B123=DL123, B4=C4=DL4))
Phonology
Consonants
Initial consonants
Lanna consonant inventory is similar to that of Lao (Isan); both languages have the sound and lack .
Initial consonant clusters
There are two relatively common consonant clusters:
- /kw/ ᨠ᩠ᩅ ᨣ᩠ᩅ (กว)
- /kʰw/ ᨡ᩠ᩅ ᨢ᩠ᩅ ᨥ᩠ᩅ ᨤ᩠ᩅ (ขว, คว)
There are also several other, less frequent clusters recorded, though apparently in the process of being lost:
- /ŋw/ ᨦ᩠ᩅ ᩉ᩠ᨦ᩠ᩅ (งว)
- /tɕw/ ᨧ᩠ᩅ ᨩ᩠ᩅ (จว)
- /sw/ ᩈ᩠ᩅ ᨪ᩠ᩅ (ซว, สว)
- /tw/ ᨲ᩠ᩅ ᨴ᩠ᩅ (ตว)
- /tʰw/ ᨳ᩠ᩅ (ถว, ทว)
- /nw/ ᨶ᩠ᩅ (นว)
- /ɲw/ ᨿ᩠ᩅ ᩉ᩠ᨿ᩠ᩅ (ญว, ยว)
- /jw/ ᩀ᩠ᩅ (ยว)
- /lw/ ᩃ᩠ᩅ ᩁ᩠ᩅ ᩉᩖ᩠ᩅ ᩉ᩠ᩃ᩠ᩅ (ลว)
- /ʔw/ ᩋ᩠ᩅ (อว)
Final consonants
All plosive sounds (besides the glottal stop /ʔ/) are unreleased. Hence, final , , and sounds are pronounced as , , and respectively.
Vowels
The basic vowels of the Lanna language are similar to those of Standard Thai. They, from front to back and close to open, are given in the following table. The top entry in every cell is the symbol from the International Phonetic Alphabet, the second entry gives the spelling in the Thai alphabet, where a dash (–) indicates the position of the initial consonant after which the vowel is pronounced. A second dash indicates that a final consonant must follow.
The vowels each exist in long-short pairs: these are distinct phonemes forming unrelated words in Lanna, but usually transliterated the same: เขา (khao) means "they/them", while ขาว (khao) means "white".
The long-short pairs are as follows:
The basic vowels can be combined into diphthongs. For purposes of determining tone, those marked with an asterisk are sometimes classified as long:
Additionally, there are three triphthongs, For purposes of determining tone, those marked with an asterisk are sometimes classified as long:
Allophones
The following section largely concerns the Nan dialect of Lanna.
Tones
There are six phonemic tones in the Chiang Mai dialect of Lanna: low-rising, low-falling, high-level with glottal closure, mid-level, high-falling, and high-rising. or low-rising, mid-low, high-falling, mid-high, falling, and high rising-falling
Contrastive tones in smooth syllables
The table below presents six phonemic tones in the Chiang Mai dialects in smooth syllables, i.e. closed syllables ending in sonorant sounds such as [m], [n], [ŋ], [w], and [j] and open syllables. Sources have not agreed on the phonetic realization of the six tones in the Chiang Mai dialect. The table presents information based on two sources, one from Gedney (1999) and the other one from the Lanna dictionary (2007) which is a Lanna-Thai dictionary. Although published in 1999, Gedney's information about the Chiang Mai dialect is based on data he collected from one speaker in Chiang Mai in 1964 (p. 725). As tones may change within one's lifetime (e.g., Bangkok Thai tones have changed over the past 100 years), the information about the six tones from Gedney (1999) should be considered with caution.
The Gedney boxes for the tones are shown below the descriptions.
Contrastive tones in checked syllables
The table below presents four phonemic tones in checked syllables, i.e. closed syllables ending in a glottal stop [ʔ] and obstruent sounds such as [p], [t], and [k].
Grammar
The grammar of Lanna is similar to those of other Tai languages. The word order is subject–verb–object, although the subject is often omitted. Just as Standard Thai, Lanna pronouns are selected according to the gender and relative status of speaker and audience.
Adjectives and adverbs
There is no morphological distinction between adverbs and adjectives. Many words can be used in either function. They succeed the word which they modify, which may be a noun, verb, or another adjective or adverb.
- ᨾᩯ᩵ᨿᩥ᩠ᨦᨳᩮᩢ᩶ᩣ / แม่ญิงเฒ่า (mae ying thao, ) an old woman
- ᨾᩯ᩵ᨿᩥ᩠ᨦᨴᩦ᩵ᨳᩮᩢ᩶ᩣᩅᩮᩥ᩠ᨿ / แม่ญิงตี้เฒ่าโวย (mae nying ti thao woi, ) a woman who became old quickly
Because adjectives can be used as complete predicates, many words used to indicate tense in verbs (see Verbs:Aspect below) may be used to describe adjectives.
- ᨡ᩶ᩣᩉᩥ᩠ᩅ / ข้าหิว (kha hiw, ) I am hungry.
- ᨡ᩶ᩣᨧᩢᩉᩥ᩠ᩅ / ข้าจะหิว (kha cha hiw, ) I will be hungry.
- ᨡ᩶ᩣᨠ᩵ᩣᩴᩃᩢ᩠ᨦᩉᩥ᩠ᩅ / ข้ากะลังหิว (kha kalang hiw, ) I am hungry right now.
- ᨡ᩶ᩣᩉᩥ᩠ᩅᩓ᩠ᩅ / ข้าหิวแล้ว (kha hiu laew, ) I am already hungry.
Verbs
Verbs do not inflect. They do not change with person, tense, voice, mood, or number; nor are there any participles.
- ᨡ᩶ᩣᨲᩦᨻᩮᩥ᩠᩵ᨶ / ข้าตี๋เปิ้น (kha ti poen, ), I hit him.
- ᨻᩮᩥ᩠᩵ᨶᨲᩦᨡ᩶ᩣ / เปิ้นตี๋ข้า (poen ti kha, ), He hit me.
The passive voice is indicated by the insertion of ᨯᩰᩫ᩠ᨶ / โดน (don, ) before the verb. For example:
- ᨻᩮᩥ᩠᩵ᨶᨯᩰᩫ᩠ᨶᨲᩦ / เปิ้นโดนตี๋ (poen don ti, ), He is hit or He got hit. This describes an action that is out of the receiver's control and, thus, conveys suffering.
To convey the opposite sense, a sense of having an opportunity arrive, ᨯᩱ᩶ / ได้ (dai, , can) is used. For example:
- ᨻᩮᩥ᩠᩵ᨶᨧᩢᨯᩱ᩶ᨸᩱᩋᩯ᩠᩵ᩅᨾᩮᩬᩥᨦᩃᩣ᩠ᩅ / เปิ้นจะได้ไปแอ่วเมืองลาว (poen cha dai pai aew mueang lao, ), He gets to visit Laos.
- ᨻᩮᩥ᩠᩵ᨶᨲᩦᨯᩱ᩶ / เปิ้นตี๋ได้ (poen ti dai, ), He is/was allowed to hit or He is/was able to hit
Negation is indicated by placing บ่ (bor, or not) before the verb.
- ᨻᩮᩥ᩠᩵ᨶᨷᩴ᩵ᨲᩦ / เปิ้นบ่ตี๋, (poen bor ti, ) He is not hitting. or He not hit.
Aspect is conveyed by aspect markers before or after the verb.
- Present can be indicated by ᨠ᩵ᩣᩴᩃᩢ᩠ᨦ / กะลัง (kalang, , currently) or ᨠ᩵ᩣᩴᩃᩢ᩠ᨦᩉᩡ / กะลังหะ (kalangha, , currently) before the verb for ongoing action (like English -ing form), by ᩀᩪ᩵ / อยู่ (yu, ) after the verb, or by both. For example:
- ᨻᩮᩥ᩠᩵ᨶᨠ᩵ᩣᩴᩃᩢ᩠ᨦᩉᩡᩃᩫ᩠᩵ᨶ / เปิ้นกะลังหะล่น (poen kalangha lon, ), or
- ᨻᩮᩥ᩠᩵ᨶᩃᩫ᩠᩵ᨶᩀᩪ᩵ / เปิ้นล่นอยู่ (poen lon yu, ), or
- ᨻᩮᩥ᩠᩵ᨶᨠ᩵ᩣᩴᩃᩢ᩠ᨦᩃᩫ᩠᩵ᨶᩀᩪ᩵ / เปิ้นกะลังหะล่นอยู่ (poen kalanɡha lon yu, ), He is running.
- Future can be indicated by ᨧᩢ / จะ (cha, , will) before the verb or by a time expression indicating the future. For example:
- ᨻᩮᩥ᩠᩵ᨶᨧᩢᩃᩫ᩠᩵ᨶ / เปิ้นจะล่น (poen cha lon, ), He will run or He is going to run.
- Past can be indicated by ᨯᩱ᩶ / ได้ (dai, ) before the verb or by a time expression indicating the past. However, ᩓ᩠ᩅ / แล้ว (laew, :, already) is often used to indicate the past aspect by being placed behind the verb. Or, both ได้ and แล้ว are put together to form the past aspect expression. For example:
- ᨻᩮᩥ᩠᩵ᨶᨯᩱ᩶ᨠᩥ᩠ᨶ / เปิ้นได้กิ๋น (poen dai kin, ), He ate.
- ᨻᩮᩥ᩠᩵ᨶᨠᩥ᩠ᨶᩓ᩠ᩅ / เปิ้นกิ๋นแล้ว (poen kin laew, , He has eaten.
- ᨻᩮᩥ᩠᩵ᨶᨯᩱ᩶ᨠᩥ᩠ᨶᩓ᩠ᩅ / เปิ้นได้กิ๋นแล้ว (poen dai kin laew, ), He's already eaten.
Aspect markers are not required.
- ᨡ᩶ᩣᨠᩥ᩠ᨶᨴᩦ᩵ᩉᩢ᩠᩶ᨶ / ข้ากิ๋นตี้หั้น (kha kin tihan, ), I eat there.
- ᨡ᩶ᩣᨠᩥ᩠ᨶᨴᩦ᩵ᩉᩢ᩠᩶ᨶᨲᩅᩤ / ข้ากิ๋นตี้หั้นตะวา (kha kin tihan tawa, ), I ate there yesterday.
- ᨡ᩶ᩣᨠᩥ᩠ᨶᨴᩦ᩵ᩉᩢ᩠᩶ᨶᩅᩢ᩠ᨶᨻᩕᩪᨠ / ข้ากิ๋นตี้หั้นวันพูก (kha kin tihan wanphuk, ), I'll eat there tomorrow.
Words that indicate obligation include at cha (ᩋᩣ᩠ᨧᨧᩢ / อาจจะ), na cha (ᩉ᩠ᨶ᩶ᩣᨧᩢ / หน้าจะ), khuan cha (ᨤ᩠ᩅᩁᨧᩢ / ควรจะ), and tong (ᨲ᩶ᩬᨦ / ต้อง).
- at cha (ᩋᩣ᩠ᨧᨧᩢ / อาจจะ, ) Might
- ᨻᩮᩥ᩠᩵ᨶᩋᩣ᩠ᨧᨧᩢᨾᩣ / เปิ้นอาจจะมา (poen at cha ma, ) He might come.
- na cha (ᩉ᩠ᨶ᩶ᩣᨧᩢ / น่าจะ, ) Likely to
- ᨻᩮᩥ᩠᩵ᨶᩉ᩠ᨶ᩶ᩣᨧᩢᨾᩣ / เปิ้นน่าจะมา (poen na cha ma, ) He is likely to come.
- khuan cha (ᨤ᩠ᩅᩁᨧᩢ / ควรจะ, ) Should
- ᨻᩮᩥ᩠᩵ᨶᨤ᩠ᩅᩁᨧᩢᨾᩣ / เปิ้นควรจะมา (poen khuan cha ma, ) He should come.
- tong (ᨲᩬ᩶ᨦ / ต้อง, ) Must
- ᨻᩮᩥ᩠᩵ᨶᨲᩬ᩶ᨦᨾᩣ / เปิ้นต้องมา (poen tong ma, ) He must come.
Actions that wherein one is busily engaged can be indicated by มัวก่า (mua ka, ).
- ᨣᩴ᩵ᨾ᩠ᩅᩫᨣ᩵ᩤᨠᩥ᩠ᨶᩉᩢ᩠᩶ᨶᨶᩰᩬᩡ / ก่อมัวก่ากิ๋นหั้นเนาะ (kor mua ka kin han nor, ) (It's that you/he/she) just keeps on eating it like that, you know?
Words that express one's desire to do something can by indicated by khai (ใค่) and kan (กั๊น).
- khai (ᨣᩕᩲ᩵ / ใค่, , to want, to desire)
- ᨡ᩶ᩣᨧᩮᩢ᩶ᩣᨣᩕᩲ᩵ᨠᩥ᩠ᨶ / ข้าเจ้าใค่กิ๋น (kha.chao khai kin, ) I want to eat.
- kan (ᨣᩢ᩠᩶ᨶ / กั๊น, , to try)
- ᨡ᩶ᩣᨧᩮᩢ᩶ᩣᨣᩢ᩠᩶ᨶᨠᩥ᩠ᨶ / ข้าเจ้ากั๊นกิ๋น (kha.chao kan kin, ) I try to eat.
Phor tha wa (ᨹᩬᩴ᩵ᨵ᩵ᩤᩅ᩵ / ผ่อท่าว่า, ) is used to give the impression or sensation of being something or having a particular quality.
- ᨹᩬᩴ᩵ᨵ᩵ᩤᩅ᩵ᩤᨻᩮᩥ᩠᩵ᨶᨻᩖᩥᨠᨾᩣᩓ᩠ᩅ / ผ่อท่าว่าเปิ้นปิ๊กมาแล้ว (phor tha wa poen pik ma laew, ) It seems that he has returned.
Final particles
Lanna has a number of final particles, which have different functions.
Interrogative particles
Some of the most common interrogative particles are kor (ᨣᩴ᩵ / ก่อ, ) and ka (ᨣᩤ / กา, )
- kor (ᨣᩴ᩵ / ก่อ, , denoting yes/no question)
- ᨾ᩠ᩅ᩵ᩁᨣᩴ᩵ / ม่วนก่อ (muan kor, ) Is it fun?
- ka (ᨣᩤ / กา (and its variants: ก๋า, กา), , denoting confirmative question)
- ᨾ᩠ᩅ᩵ᩁᨣᩤ / ม่วนกา (muan ka, ) It is fun, right?
Imperative particles
Some imperative particles are ᩃᩯ᩵ (แล่), ᨧᩥ᩠᩵ᨾ (จิ่ม), and ᨴᩮᩬᩥᩡ (เตอะ).
lae (ᩃᩯ᩵ / แล่, )
- ᨠᩥ᩠ᨶᩃᩯ᩵ / กิ๋นแล่ (kin lae, ) Eat! (Authoritative).
chim (ᨧᩥ᩠᩵ᨾ / จิ่ม, )
- ᨡᩬᩴᨠᩥ᩠ᨶᨧᩥ᩠᩵ᨾ / ขอกิ๋นจิ่ม (khor kin chim, ) May I eat please?
hia (ᩉᩮ᩠ᨿ / เหีย, )
- ᨠᩥ᩠ᨶᩉᩮ᩠ᨿ / กิ๋นเหีย (kin hia, ) Eat! (because I know it will be beneficial to you).
toe (ᨴᩮᩬᩥᩡ / เต๊อะ, )
- ᨠᩥ᩠ᨶᨴᩮᩬᩥᩡ / กิ๋นเต๊อะ (kin toe, ) Eat, please.
Polite particles
Polite particles include ᨣᩕᩢ᩠ᨷ (คับ) and ᨧᩮᩢ᩶ᩣ (เจ้า).
- khap (ᨣᩕᩢ᩠ᨷ / คับ, , used by males)
- ᨠᩥ᩠ᨶᨡᩮᩢ᩶ᩣᩓ᩠ᩅᨣᩕᩢ᩠ᨷ / กิ๋นเข้าแล้วคับ (kin khaw laew khap, ) I have eaten, sir/ma'am.
- chao (ᨧᩮᩢ᩶ᩣ / เจ้า, , used by females)
- ᨠᩥ᩠ᨶᨡᩮᩢ᩶ᩣᩓ᩠ᩅᨧᩮᩢ᩶ᩣ / กิ๋นเข้าแล้วเจ้า (kin khaw laew chao, ) I have eaten, sir/ma'am.
Nouns
Nouns are uninflected and have no gender; there are no articles.
Nouns are neither singular nor plural. Some specific nouns are reduplicated to form collectives: ᩃᩡᩋᩬ᩵ᩁ / ละอ่อน (la-orn, , child) is often repeated as ᩃᩡᩋᩬ᩵ᩁᪧ ละอ่อน ๆ (la-orn la-orn, ,) to refer to a group of children.
The word ᩉ᩠ᨾᩪ᩵ / หมู่(mu, ) may be used as a prefix of a noun or pronoun as a collective to pluralize or emphasise the following word. (ᩉ᩠ᨾᩪ᩵ᨹᩫ᩠ᨾ / หมู่ผม, mu phom, , we (exclusive), masculine; ᩉ᩠ᨾᩪ᩵ᩁᩮᩢᩣ / หมู่เฮา mu hao, , emphasised we; ᩉ᩠ᨾᩪ᩵ᩉ᩠ᨾᩣ / หมู่หมา mu ma, , (the) dogs).
Plurals are expressed by adding classifiers, used as measure words (ลักษณนาม), in the form of noun-number-classifier ( ᨣᩕᩪᩉ᩶ᩣᨤᩫ᩠ᨶ / คูห้าคน, "teacher five person" for "five teachers").
Pronouns
Pronouns may be omitted once they have already been established in the first sentence, unless the pronoun in the following sentences is different from the first sentence. The pronoun "you" may also be omitted if the speaker is speaking directly to a second person. Moreover, names may replace pronouns, and they can even replace the first person singular pronoun.
Vocabulary
Lanna shares much vocabulary with Standard Thai, especially scientific terms, which draw many prefixes and suffixes from Sanskrit and Pali, and it also has its own distinctive words. Just like Thai and Lao (Isan), Lanna has borrowed many loanwords from Khmer, Sanskrit, and Pali.
Writing system
Currently, different scripts are used to write Lanna. Lanna is traditionally written with the Tai Tham script, which in Lanna is called tua mueang (ᨲᩫ᩠ᩅᨾᩮᩬᩥᨦ ตั๋วเมือง ) or tua tham (ᨲᩫ᩠ᩅᨵᩢᨾ᩠ᨾ᩺ ตั๋วธัมม์ ). However, native speakers are presently illiterate in the traditional script; therefore, they instead use the Thai script to write the language. In Laos, the Lao script is commonly used to write Lanna.
Some problems arise when the Thai script is used to write Lanna. In particular, Standard Thai script cannot transcribe all Lanna tones. The two falling tones in Lanna correspond to a single falling tone in Thai. Specifically, Lanna has two types of falling tones: high-mid falling tone () and high-falling tone (). However, Thai lacks the distinction between the two falling tones, not having a high-falling tone (). When using Thai script to write Lanna tones, the distinction of the two falling tones is lost because Thai script can only indicate a low falling tone (). As an example, the tonal distinction between (ก้า (ᨠᩖ᩶ᩣ กล้า) "to be brave") and (ก้า (ᨣ᩵ᩤ ค่า) "value") is lost when written in Thai since as only (ก้า) is permitted. Consequently, the meaning of ก้า is ambiguous as it can mean both "to be brave" and "value". Similarly, (ป้าย (ᨸ᩶ᩣ᩠ᨿ ป้าย) "sign") and (ป้าย (ᨻ᩵ᩣ᩠ᨿ พ่าย) "to lose") have the same problem and only (ป้าย) is permitted. As a result, the spelling ป้าย is ambiguous because it can mean both "sign" or "to lose". Such tonal mergence ambiguity is avoided when the language is written with the Lanna script.
Lanna and Standard Thai
The tables below present the differences between Lanna and Standard Thai.
Different sounds
Unlike Lanna, Standard Thai lacks alveolo-palatal nasal sound (/ɲ/). Thus, the alveolo-palatal nasal sound (/ɲ/) and the palatal approximant sound (/j/) in Lanna both correspond to the palatal approximant sound in Standard Thai:
Unlike Lanna, Standard Thai lacks a high-mid-falling tone ([˥˧]). The high-mid falling tone ([˥˧]) and high-falling tone ([˦˩]) in Lanna both correspond to the falling tone in Standard Thai ([˦˩]).
Different words
Many words differ from Standard Thai greatly:
Similar words
There is not a straightforward correspondence between the tones of Northern and Standard Thai. It also depends on the initial consonant, as can be seen from the merged Gedney tone boxes for Standard Thai and the accent of Chiang Mai:
Note that the commonalities between columns are features of the Chiang Mai accent. On the other hand, the relationships between rows are typical of Lanna, being found for at least for Chiang Mai, Chiang Rai, Phayao, Nan and Prae, and extending at least to Tak and the old 6-tone accent of Tai Khuen, except that the checked syllables of Chiang Rai are more complicated.
The primary function of a tone box is etymological. However, it also serves as a summary of the rules for tone indication when the writing system is essentially etymological in that regard, as is the case with the major Tai-language writing systems using the Thai, Lanna, New Tai Lue, Lao and Tai Dam scripts.
Some words differ only as a result of the regular tone correspondences:
Other tone differences are unpredictable, such as:
Some words differ in a single sound and associated tone. In many words, the initial ร (/r/) in Standard Thai corresponds to ฮ (/h/) in Lanna:
Aspiration of initial consonants
Some aspirated consonants in the low-class consonant group (อักษรต่ำ /ʔàk.sɔ̌ːn.tàm/) in Standard Thai correspond to unaspirated sounds in Lanna. These sounds include ค, ช, ท, and พ (/kʰ/, /tɕʰ/, /tʰ/, and /pʰ/ respectively), but sounds such as ฅ, คร, ฆ, ฒ, พร, ภ (/kʰ/, /kʰr/, /kʰ/, /tʰ/, /pʰr/, and /pʰ/ respectively) remain aspirated. Such aspirated consonants that are unaspirated in Lanna correspond to unaspirated voiced sounds in Proto-Tai which are *ɡ, *ɟ, *d, and *b (ค, ช, ท, and พ respectively):
But not:
Though a number of aspirated consonants in Standard Thai often correspond to unaspirated sounds in Northern Thai, when an unaspirated consonant is followed by ร (/r/) the unaspirated consonant becomes aspirated:

