There are consistent trends in the past evolution of languages, and in
all likelihood they will continue to change in the same fashion in the
future.
In 200 years, spoken French will have only one sound, a vowel. All
consonants and gaps between words and sentences will disappear, leaving
only an extended Eauuuuuuuuuuuu… Meaning will be inferred from
facial expression. Written French will stay exactly the same.
These consonants will not be entirely forgotten; they will migrate
to Czechoslovakia, which will by that time have no use for vowels.
In 200 years, the English vocabulary will be the union of all other
vocabularies, but the spelling will be original.
Similarly, the Japanese alphabet will be the union of all other
alphabets in the world.
The Cyrillic alphabet will eventually be the same as the Latin
alphabet, only backwards. A mirror will suffice for translating
Russian into Polish.
Finally, in 200 years, entire books in Germany will be one word. Plus
a verb at the end, of course.