The most English thing is ditching grammatical cases, except for keeping around a residue of the genitive, reducing it to a mere possessive suffix written in an identical way as a contracted "is" even on words that historically had a different genitive than -s, except in pronouns where the historical genitive form is retained (my, mine, etc.) looking nothing like the possessive suffix except in a few coincidental cases where they do indeed end with -s, making them easily confused with other forms of the same pronoun contracted with "is".