wordpress – Subdirectory for the bilingual website

I made a bilingual web site of woocommerce. I used the wpml plugin. But sometimes, when I change from English to French, the website breaks. now the wpml plugin requests an update and its paid. I was thinking of doing the French version with the subdirectory folder. Is it a good idea? the site contains about 1000 images. So, if I create a French version with subdirectory, does it slow down the speed of the website?

Thank you