Popipz

Ok so from what I understand, since I play with the game in French and installed a lot of mods without French localization, a lot of dialogues in the games are not voiced anymore, as well as a lot of texts appearing in English instead of French. I read somewhere that it is possible to change that by using TES4edit, and copying the French texts/races name from Oblivion.esm into the mods where they are in English, I tried to do that but it doesn't work IG, so I guess just doing a copy paste is not enough. What can I do to make it works correctly ? I know just putting the game in English would work but I don't want to play in English and I don't mind doing it manually on every mod even if it takes time, the problem is that I can't find a clear explanation or video showing what to do step by step to resolve the problem, only vague explanations that doesn't really help once I opened TES4edit and have the files in front of me '-'