Trying to configuring the plugin, I noticed that tooltips were looking for a variable which name ends by _TIP, but they don't find it.
In the en-GB.plg_vmpayment_standard.ini file, the variables names for tooltips end by _DESC or _EXPLAIN. So, the program can't find them and tooltips show the name of the variable only.
I renamed the names of the variables in the attached file, and now everything works.
Is the file useful for you?
[attachment cleanup by admin]
Thank you, looks good.