Format Specifier in a String Messsage with different Collation

Our product is creating a  message with a format specifier {%s}.  where ever we are using the message ,we are  using  a local variable to supply the message text for RAISE error. 

Here is the Raiseerror command:

RAISERROR (777, 16, 1,@Some_String);

The message definition for 777980010 is

EXECUTE sp_addmessage @msgnum = 777, @msgtext = N' {%s} text message.', @severity = 16, @lang= 'us_english', @with_log = false, @replace = 'REPLACE'

GO

EXECUTE sp_addmessage @msgnum = 777, @msgtext = N'{%s} text message', @severity = 16, @lang = 'Japanese', @replace = 'REPLACE'

GO

When the error is being raised and caught as the  ADO.net exception , its showing the “Invalid format specification:” for Local language like Japanese but working fine on english.

So if I change the format specifier to    %1! Instead of{%s} it is working for Japanese but is breaking for English.

Can you please point me the correct format string specifiers in this context for each language?