Is it possible to translate the text in the previous / next step buttons on a multi page epi form? I am new to Epi Forms so please forgive me if there is an obvious answer to this ;).
You can do it via the localization (https://world.optimizely.com/documentation/developer-guides/CMS/globalization/localizing-the-user-interface/). Just create a new XML with the following structure and replace the labels as required:
<?xml version="1.0" encoding="utf-8"?>
<language name="English" id="en">
So, I think the documentation is pretty good on localization, but as a summary:
An example is in Foundation: https://github.com/episerver/Foundation/tree/main/src/Foundation/lang
In short, you create the "lang" folder in your solution (if it doesn't exist already), create an XML (maybe call it Forms_EN.xml) and copy the snippet into it that I provided above. This will be (by default) picked up automatically from that location, if doesn't matter if content has already been created.
To find the XPath of an existing string so you can override it your best bet is to use a decompiler (like JustDecompile) and dig around in the assembly. Here is an old blog post (from CMS 7) that gives an idea of the structure and approach, whilst this is old the technique still holds up: https://getadigital.com/no/blogg/translating-episerver-ui/
Finally, it's actually possible to change the localization provider, if you want to make this stuff more accessible to editors I recommend the DbLocalizationProvider which is available as a NuGet package (https://github.com/valdisiljuconoks/localization-provider-epi).
Hope that's enough detail to get you started.