Fix some french mistakes

[QuentiumYT]

Half a fix for #337, it does correct a few wrong things but I cannot find a way to satisfy both of these cases:
à partir de 03:00 and à partir de 3 du mois as "à partir" is only declared once in the methods.

The reason is in french, "à partir" is correlated by the subject, when it's a specific period (for example a day like monday or a month or a defined hour like 03:00), we say "à partir de".
When it's about a specific time / date (for example 3 january or "15" of the month), we say "à partir du".

As this project doesn't have something particular for any language, I kept "à partir de" as a general case, meaning à partir de 3 du mois is wrong.

[bradymholt]

Thanks! @QuentiumYT - would you be up for added these French tests as part of this PR?

[QuentiumYT]

Oh sure, I thought it would only be for the fixes :) will commit some specific cases I added also. Will do that later thanks