Earlier quoted context omitted.
I don't get the 2nd part, there is nothing stopping French companies translating into the one other language which they probably speak fluently, English, testing it in the UK as they're roughly the same timezone, then moving onto the big English speaking markets of the US, Canada and Australia, which are all significantly bigger than probably 17 of those 20 languages. And the finance thing has nothing to do with Macr…
I interpreted it as required by regulation to support the mentioned languages. However, I would like to understand if this is the case.
For public and almost-public organizations, there is a regulation: you can communicate in exactly one language (French) or at least three languages (usually these will be English and German).
On the other hand, trying to sell to the average French person will require a French translation, and the same is probably true for most other EU countries if you wish to improve your chances ("have a translation in that language" is likely in the top 5 of improvement suggestions for a new market). 300 million people sharing the same language is a boon, especially for B2C or B2SMB.