Paola

I'm not sure you have installed the correct plugin.  This is the one you should have:

https://appstore.sdl.com/language/app/mxliff-file-type/962/

Paola said:

I have also tried to add the extension *.mxliff to the XLIFF filetypes (also to the XLIFF 2.0) as suggested in this post: https://community.sdl.com/product-groups/translationproductivity/f/studio/8398/memsource-files-in-studio - but it doesn't work.

I'm not sure why you are sharing that screenshot... but that makes me think you aren't really confident about what to do here at all.  If you added that extension here:

And you created your project using the same template you added this extension to, then it will surely work.  Please provide some indication of how you made sure that the filetype you adapted is being used for your project?

It's also possible of course that there i simply something wrong with your mxliff file.  Have you attempted to validate that in any way?  So check it's well formed for example.

Dear Paul,

thank you for your reply. Steven Whale helped me download the (correct) plugin from the AppStore.

I was able to install it, import the file, translate and generate the target translation. 

I was also able to import this back in Memsource, so I am all good.

I don't understand well if I have to check the 'Add segmentation information' (or not) under the XLIFF filetype or if it is irrelevant since I have installed the MXLIFF filetype.

I have read many pages on the subject, from different years, and I am a little confused.