I currently have a client who has a Grandma that was Swiss-German. Since I know little about Switzerland records and laws regarding genealogy access, I reached out to a colleague that knows German Script.
Knowing when to ask for others expertise as a Professional Genealogist is key when you are working for a client that needs answers to questions that you know can be answered through coordination with other professionals in the field. It benefits you, the client, and the wonderful field of Genealogy. As a Professional Genealogist it enhances what you can offer to future clients. Plus you to learn too.