Indo-European= A big family of many languages and dialects, including Europe languages, the northern Indian subcontinent, the Iranian plateau and many country of central Asia. This regrouping of languages is the most widespread in the world and more than 3 billion native speakers are apart of this group. There are many subdivision that classified the type of language. All those categories have similarities thats why there are in this group. Germanic is one of the source of all language in this group. So even Asian language have similarities with European languages.
So that suggest that many language have the same source and that in each of this language thera are similarities even if some language have similarities with another group.

Why is English similar to French?
Because these two languages evolved together. Also, at the time these two languages were used. what was law and government and king used French and the remainder English. Therefore, French influenced the English language much because they was the two principal languages.

How is english similar to French?
By the vocabulary: During the Norman occupation, about 10,000 French words were adopted into English, some three-fourths of which are still in use today. This French vocabulary is found in every domain, from government and law to art and literature - learn some. More than a third of all English words are derived directly or indirectly from French, and it's estimated that English speakers who have never studied French already know 15,000 French words. Example: Aide-mémoire=Memory aid, attaché=Attached
Bon appétit=Good appetite, cerise=cherry, c’est la vie=That’s life etc.

By the pronunciation : English pronunciation owes a lot to French as well. Whereas Old English had the unvoiced fricative sounds [pic], [pic], [pic](as in thin), and [pic](shin), French influence helped to distinguish their voiced counterparts [pic], [pic], and [pic](mirage), and also contributed the diphthong [pic](boy)