Jane Crossley 

There seems to be a fair amount of uncertainly about what exactly is your client asking from you.
From my experience dealing with multiple requests for localisation I believe the following is needed for translation,  which actually goes a bit beyond simply not translating the {}

1. We've received your feedback and will respond shortly if required. 
2. Your account was created with the email address:
3. You have of store credit 

Last one is tricky to decipher and users could spend hours creating all layers of complex rules only for it not to be what was expected. 
Best clarify and let us know along with the source file if possible

Lyds

Jane Crossley 

There seems to be a fair amount of uncertainly about what exactly is your client asking from you.
From my experience dealing with multiple requests for localisation I believe the following is needed for translation,  which actually goes a bit beyond simply not translating the {}

1. We've received your feedback and will respond shortly if required. 
2. Your account was created with the email address:
3. You have of store credit 

Last one is tricky to decipher and users could spend hours creating all layers of complex rules only for it not to be what was expected. 
Best clarify and let us know along with the source file if possible

Lyds

Thanks for coming back to me, Lyds. We may not be required to translate the file, but I'll send you the source if we do.