I want to translate ubuntu English to my own language ( Tai) . Please where i have to start?

If you meant in Thai (with an H), the launchpad translation location for that is: https://translations.launchpad.net/ubuntu/oneiric/+lang/th

Just remember that this is a Managed group, by Ubuntu Thai Translators, and all your translation suggestions will need prior approval by them before being taken into account. Ultimately, after demonstrating your commitment to the translation project, you may try to become a member of the Ubuntu Thai Translators group, but do understand this is a restricted group and you will have to wait for someone to "let you in".

No I mean ( Tai)

http://www.loc.gov/standards/iso639-2/php/English_list.php

We already have the Tai Language Please Check !

Hi,

Can you please provide the identifier for this language? Is it 'tai' (http://en.wikipedia.org/wiki/Tai_languages) or 'shn' (Language (http://en.wikipedia.org/wiki/Shan_language).

Also, to open this language for translation we need to know how plural forms relate to numbers. In English there is a singular and a plural, and you use the singular for 1 object but the plural for 0, 2, and any other number of objects. Some languages have more forms than just a singular and a plural, some have only one. Some use the singular for 0 objects. We encode this information as a number of forms, and a formula for which form to use for what numbers.

Best,

Raphaël

Raphaël explanation is the answer.