使用正则表达式检测并删除附加到字符串的数字

I receive definitions of words via json. Sometimes I receive stuff like this:

inclusa1.

(the number can also be 2, 3, and so on). How can I automatically detect (and remove) numeric characters that are appended to words?

Eg: This is acceptable:

people that live in 1 house.

Eg: This is not acceptable:

people1.

preg_replace('/(?<=[a-zA-Z])[0-9]/', '', $string);

This just removes any numeric characters preceded by an alpha.

Assuming a word is just made up of letters, this should work:

preg_replace('/([a-zA-Z])[0-9]+/', '$1', $string)

preg_replace('/(\b[A-Z]+)([0-9]+)/i', '$1', $string);