В свое время нашел вот такие советы:
In the toolset there is no tool to manage foreign languages (I read an answer from a Bioware guy explaining that the language tool they use was not implemented in the toolset for players). If you want to manage foreign languages, you have to create your own talktables.
Here is a nice tool done by anakin5 for that
http://social.bioware.com/project/1586/#details*************************************
- build your module/addin and use english as the core language because other languages do have display problems (like in german the umlauts)
- dialogues, item names and descriptions could use placeholders so that you are able to identify them later within the string editor
- after building your module/addin check in all your resources
- open up the string editor and check if all the needed resources are there
- export your module/addin and afterwards your talktable ("export talktable")
- you will get 3 talktables scattered around within the module's folders
- two of the 3 talktables have a suffix = _f and _c
i do believe that _f stands for foreign and _c is for core. the foreign language is always empty and can be deleted. the core talktable contains descriptions for skills, materials and so on. if you don't use custom ones this talktable can be deleted too. you just need the "your_modules_name_en-us.tlk"
- copy this tlk and rename it with the appropriate language suffix = e.g.: your_module_name_es-es.tlk for spanish
- drag'n drop this talktable within the toolset's window and it will open a node tree with all the string entries containing the english description
- rewrite all the entries and do the translation^^
- afterwards just save the tlk
- now place this tlk within the following folder:
your base tlk (modules_name_es-es.tlk) = my documents/bioware/dragon age/addins/modules_name/module/data/talktables
the core talktabe (modules_name_c_es-es.tlk, as said only useful if you are using custom skills and other custom core resources) = my documents/bioware/dragon age/addins/modules_name/core/data/talktables
- the last step is to push all your exported resources (like items, characters, dialogues and so on) through the flag patcher anakin5 provided and your are done
- now if you need other languages just grab your tlk, copy and rename it, drag'n drop within the toolset and rewrite all the entries
the tlktool is only needed if you are translating all the languages on the fly. i never used it and therefore it is not tested by me, although it may give you a more comfortable workflow. i like to do it manually

within the toolset's options you could also switch to another language but it seems that the toolset was never designed to use other string characters then the english ones or i am just too stupid^^
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first you only need the tlk file located at your module/override folder. the others are not important if you only want to translate dialogues, item descriptions and so on. if your tlk file is empty then you propably have not checked in your resources. after the check in you could open the string editor and verify that all of the resources, that need a translation, are there.
to check in a resource you right click it and select "check in".
it is highly recommended that you build your module in english as the core language - with other languages there will pop up problems with special characters (like umlauts in german). after exporting your english talktable you should make a copy of it and drag'n drop it into the toolset and edit the strings of the entries line by line to the targeted foreign language. than you have to rename the tlk file to the appropriate language (e.g. german = de_de, russian = ru_ru... check the installed tlk files of the official dlc within your documents folder for the correct names).
now you have to use the flag patcher anakin5 made so that the talktables get recognized by the game engine. after all this hassle you successfuly made your first translation in dragon age: origins
anakin also made a great tool to easily create lots of talktables for different languages. give it a try