My request will be useful especially for people using non-English WordPress versions.
There are some permalinks which are not translateable or changeable in WordPress. For example, we can change the slug of the permalinks for "category". But we cannot change the slug of the permalink for "page", "author" from the administration panel.
Can these be changeable in the future versions of WordPress, and can they be changed from Options -> Permalinks section in panel like "category"?