[MCPE-21990] Various Commands are Missing Their Descriptions

^{Update by [Mojang] Mega_Spud (Jay Wells):}
Verification builds:
1.1.0.9 Retail

Summary:
Various commands are missing their description in the Help section, because the description is missing from the .lang game file. These include:

clear
effect
me
playsound
replaceitem
setmaxplayers
spreadplayers
stopsound
testfor

Steps to Reproduce (example):

Type '/help me' in chat (or use any from the list above)

Observed Results:
A generic reference to where the description should be is shown on screen.

Expected Results:
I expected to see the description printed on screen.
(For a working example, use '/help kill')

Screenshots/Videos attached: Yes

Notes:
See this comment for the missing sections of the .lang file that can be added.

Original Description:

When typing '/help effect' or '/help me' there's no description for the command.