Multi-language plugin advice

Hello,

I am trying to build a wordpress based ecommerce website with woocommerce, and would like to set up 2 languages to the website.

I already have the .po files and the website is pretty much translated already so I would like to hear some advice on what plugin would be good to switch between 2 languages (switching between the .po files pretty much)

I have looked up at some plugins but it seems to me that they all require you to translate the website as you build it up.
I already have the files translated so I don’t really want to go back and re translate everything again for each page.

also, I don’t want posts to be translated, just the core website (menus etc..) there will be some reviews in both languages and I am fine in leaving them as is and not being translated

I might be wrong in my understanding so any advice would be appreciated.

Thanks in advance!