

Text speak mostly came from typing on dumb phone number pads to enter text. Like if you wanted to type “hi” you would have to enter “4-4 pause 4-4-4” As you might expect 5 putting presses with a pause between some of them just to say “hi” got painful. Thus the shortening.
Text messages were always charged per message. But each message was limited to 160 ascii characters or less if you were using other encodings. You could send 1 character or 160 characters but it cost 20 cents (at least where I grew up) either way.
This is all separate from l33t speak which is a whole different thing.
It matters though. Like in Germany telegram is associated with hard right wings groups. Telling someone you use telegram makes them assume that you are a part of hard right ideologies.
It’s a shame as the telegram app is really snappy. You always have to say that you are on telegram but are not right wing. Even then people can be suspicious.