You probably should since you never know what someone else is thinking.
The French in France don't really care for Americans and perhaps why she said it is impossible to translate English into another language, because it' s not.
It's her personal perception of the general attitude in the country towards our culture.
So cover yourself anyway and disclose that everything is in English and it is up to the other language person to translate, especially since they are tutorials.
I just took a look at your banner and the Asian writing on the banner may suggest these are in multiple languages, something to think about.
Hope this helps and have a great day. :)
