This is not a Joomla string, it's the message displayed by the HTML5 required
attribute. To change the message you have to check the loads of suggestions in the following questions:
Change text of Please fill out this field tooltip in Joomla 3
Question
It is set by default that when I create input fields and set them to be required, when users don't fill in anything, they got a massage:
Please fill out this field
I am creating a website with Joomla, and this tooltip pops out in every browser displaying the above text. How to change the text.
I tried to look up in Joomla language ini files, but no success. Is there some easy way to change this, or some advice where it could be?
Solution
OTHER TIPS
if you are writing your own component (or module/plugin), it sounds like this is the description - field in the form-xml for your component. If the form is auto-generated from a component-creator, the file should be found in /(administrator/)components/com_yourcomponent/models/forms
but some more info on where/what you are doing would help.
regards Jonas