1)modify mysql database (replace title with title_en, and add title_tr)
2)modify table definition classes
3)modify display in administration (list_view file, form_view file, model file)
4)modify models on frontend (change queries to use title_$lang instead of title.
(I will provide helper function)
There are about 5-6 models with sql function
-modify helper functions in some modules (there are about 5-6 of them with 1 function)
4a) you do not have to modify views on frontend, since you modified models. I am not sure, maybe somewhere is left select *, there you need to do something
5)modify parser in backend.
- main parser to write title_en instead of title
- translation parser modify to write in main table to title_tr instead in translation table
6) modify sef module to fetch $title instead of title
7) modify parser for betfair