There are a couple of English problems to sort out. Firstly, are you saying that you are the leading analyst in France, or the leading analyst in what we Canadians call the Francophonie, or the leading provider of French-language analytical tools? Secondly, you will need to pluralize "solutions" in any variation on the first two slogans, if you are using "leader" in the normal way, referring to your business, not the product itself.
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