Hello,
You can take advantage of the
localization macros.
In your case, please firstly define the Site Display Name option within:
Site Manager -> Sites -> Edit -> General tab. It can look like this (as an example):
{$|en-Us=Corporate Site|cs-CZ=Web společnosti$}Afterwards, you'll use the following context macro: {%SiteDisplayName%} in
Site Manager -> Settings -> Your_Site -> Web site -> Page title prefix/format.
This should enforce your culture specific display name appears in the page title.
Best regards
Ondrej Vasil