Why have the french made laws forbidding the use of foreign words?

Answer 1

They have not. They have laws to make sure the French government in its official documents uses French as far as possible, as French is the language of France, but there are no laws that forbid the use of foreign words.

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The French Académie française, regarded as the

official custodians of the French language resists the addition of new foreign words (especially those coming from English) to the language. The French have a high regard for their own culture and I think they feel threatened by the global adoption of English as a prefered second language. The Academy is entrusted with protecting French from "Anglo-Saxon" attacks and writing an official dictionary. An example of what they do is come to up with French equivalents to unwanted English words that slip into French - for example turning "email" into "courriel".

Answer 2

The French language laws aim to preserve and protect the French language, culture, and identity from the influence of foreign languages. The laws encourage the use of French in communication to maintain its dominance in various sectors, including business, media, and education. Additionally, promoting the French language helps to foster national unity and pride among its speakers.