Could you please translate the following words from English to Hindi
(if possible), or some other related Eastern-Indian Language:

"Let the sun shine again"

"May the clouds break,
and the sun shine free,
may the sky bring joy to you."

"let the sun warm your soul"

Also, can you give us information on how to pronounce - or where we
can find pronounciation?

if u want a literary translation in hindi, here it goes:
Suraj ko phirse chamakne do 
Baadalon ko tootne do aur sooraj ko aazaad chamakne do
yeh aasmaan aapko khushiyan de
Yeh suraj aapki aatma ko garam kare...

a better version would be::
Ye suraj phir se ubarke aaye,
baadal bikharjaayen aur suraj ki kirne aazaadise jagmagaa uthe....
yeh aasmaan aapo dher saari khushiyan sametkar laayen
yeh sooraj aapki rooh ko garmahat pahuchaaye..

the best thing while pronouncing this would be to prounounce a short
vowel when ther's one 'a' & pronounce it long when there's 2 'a's .
Best is to make someone who knows hindi read it :)