Changing source language

Hi,

I have the following problem and am wondering if anyone can suggest a possible/best way of solving it with SDL Trados 2019 Professional.

I have to manage translations into about 26 languages, and use either French or English as the source language, depending on the target language. I also have a very complete FR-EN translation memory.

For translating into Slovak, English is the current source language (EN-SK translation memory). In a near future, I will have to use French as the source language. 

Is there any way with Trados to create a populated FR-SK Translation Memory from my existing FR-EN and EN-SK translation memories?

Many thanks in advance for any suggestions!