Question Replacing text with buttons on Kunena login module

Hi, I wish to replace the following text items with images on Kunena login module. Kunena and module are v 1.7.2, default template

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Forgot Password
Forgot Username
Create an account

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A suggestion was made to edit en-GB.com_kunena.ini and replace the below with ="<img....." but I could only find

COM_KUNENA_PROFILEBOX_CREATE_ACCOUNT="Create an account"
COM_KUNENA_PROFILEBOX_FORGOT_PASSWORD="Forgot your password?"
COM_KUNENA_PROFILEBOX_FORGOT_USERNAME="Forgot your username?"

The others I could not find. Is there a better solution to this?

Have you tried something like this:

COM_KUNENA_PROFILEBOX_CREATE_ACCOUNT="<img src='<URL>' alt='Create an account' title='Create an account' width='<value>' height='<value>'>"

Yes and it works, but not all the variables are contained in the language file (en-GB.com_kunena.ini), I can only find the 3 mentioned in my original post so they must be coming from somewhere else