To translate the "Sign In" button in Power Apps, you'll need to customize the translation for the specific language you want. Since you already have multi-language enabled and have managed to translate other elements, you're on the right track.
Here's how you can proceed:
1. Open your Power Apps project where the "Sign In" button is located.
2. Navigate to the Header Menu or wherever the "Sign In" button is placed.
3. Click on the "Sign In" button to select it.
4. In the properties panel, look for the "Text" property of the button. This is the property that contains the current text "Sign In."
5. Change the text to your desired translation. For example, if you want to change it to "0," simply replace "Sign In" with "0." If you want to use special characters like "||," you can directly paste them into the Text property.
6. Save your changes.
7. Now, make sure you've set the appropriate language for which you want to see this custom translation. For instance, if you want to see the "0" translation in Croatian, ensure that you've set the app's language to Croatian.
8. To set the app's language, you can do one of the following:
a. In the Power Apps Studio, go to the File menu, then select App settings. Under the Advanced settings, find the "App language" option, and select Croatian.
b. Alternatively, you can also set the app's language programmatically using the Set function. For example, you can use the following code in the app's OnStart property to set the language dynamically:
```
Set(AppLanguage, "hr-HR"); // Set Croatian (Croatia) as the app language
```
Remember that the language code for Croatian (Croatia) is "hr-HR."
9. Once you've set the appropriate language, you should see the custom translation ("0", "||", "Admin", or whatever you set) for the "Sign In" button when you run the app in Croatian.
By following these steps, you should be able to customize the translation of the "Sign In" button in the Power Apps header menu for different languages, including Croatian or any other language you wish to support.