Why is French related to Spanish, Portuguese, Romanian, Italian

some languages were developed first. When new languages started being made, they had to have a base, so the words we use have roots from other languages. This is similar to the development of slang. An example is how a lot of people in England say "water closet" when we say "bathroom" and how the English word "alphabet" comes from the Latin "alpha" and "beta"

big fat oof x