Hi Zaid
When you enter TCode LPD_CUST and press edit or view for the launchpad configuration in question, you can enter "xml" in the Tcode input field in the top left corner and press enter. Then you will get the xml-file displayed. If you do that, are your text entries starting with a Z? (Did you remember to use z as the namespace when you transported the launchpad?)
You might have been creating your launchpad in one language on DEV (thus only having texts for your master language) and then log on QA with a different language. Then you will not see any texts. And most of the standard launchpads only contain english texts.
If you did perform your translations properly, you have to pick them up manually in a transport by using Tcode SLTX.
Best regards,
Martin