cm69 SMF will encourage ANY language translation. There is already a translator for Latvian, so the project has already begun. I saw he is inactive since July 2011.
If you believe that you have good enough knowledge and skills both of your language and English and you can produce good translation results you could assist for a good quality SMF Latvian translation.Read again the first message in this post and, if you feel you can really help send the required email
You can also encourage friends of yours that you believe have the necessary knowledge and skills for translating and/or previous experience to either participate, or help you with Latvian translation.
When a good percentage will be done, it will be good for SMF and for Latvians to be added in languages available for download.