label Text is not changing using Qt Linguist

[thomasjoy]

but this whole source tags text comes in .ts file from VolumeActionDialog.ui of dialog folder it is not manually added i had just added it's translation tags text

so according to you what i have to do
can you please tell it in a code example

Did you use lupdate to create a translation file or did you create/modify it by hand?

lupdate is used for first to create ts file and after adding translation tags again i do lupdate to modify it....

when i use <b></b> and then i do lupdate then these tags are removed from ts file

and what about this

By the way - your dialog doesn't have a layout. Everything will break if you start resizing the window.