fr-FR: Fix typos and errors

[rmnvgr]

Found and fixed some mistakes and typos in the French translation.

[github-actions]

Check results

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	Missing The translation is not added to translation file. (e.g. STR_9999 is in en-GB but is not available in given language)	Not needed The translation file contains entries that are not in en-GB and should be removed (e.g. STR_9999 exists in given language but is not in en-GB)	Same The translation and source string is exactly the same. (e.g. STR_9999 is Umbrella in both en-GB and given language). This may be desired in some cases (e.g. April is the same in English and German)
fr-FR	0	0	126

Other translations

	Missing The translation is not added to translation file. (e.g. STR_9999 is in en-GB but is not available in given language)	Not needed The translation file contains entries that are not in en-GB and should be removed (e.g. STR_9999 exists in given language but is not in en-GB)	Same The translation and source string is exactly the same. (e.g. STR_9999 is Umbrella in both en-GB and given language). This may be desired in some cases (e.g. April is the same in English and German)
ar-EG	269	0	1719
ca-ES	16	0	79
cs-CZ	0	0	132
da-DK	11	0	308
de-DE	9	0	131
en-US	3435	0	1
eo-ZZ	0	0	54
es-ES	6	0	150
fi-FI	93	0	81
fr-CA	3600	0	0
gl-ES	2	0	78
hu-HU	0	0	76
it-IT	18	0	122
ja-JP	93	0	109
ko-KR	0	0	76
nb-NO	178	0	153
nl-NL	9	0	168
pl-PL	57	0	84
pt-BR	0	0	123
ru-RU	0	0	100
sv-SE	6	0	145
tr-TR	505	0	91
uk-UA	174	0	708
vi-VN	23	0	101
zh-CN	6	0	22
zh-TW	42	0	99