How can I create a Japanese language .xpt file from an English language source?

[SASKiwi]

What does this mean exactly? Please describe what you want in more detail. Are you referring to SAS's language settings or something else?

[zenenceladus]

I need to convert the metadata and data in the .xpt file into Japanese.

[japelin]

If you use a SAS that can handle Unicode or DBCS, I think you can do it.
For example, SAS Studio, SAS 9.4 (English with DBCS), SAS 9.4 (Unicode support), or SAS 9.4 (Japanese).

[ChrisNZ]

Your need is unclear. 

See the INTYPE option to set DBCS when creating a XPT file https://documentation.sas.com/doc/en/pgmsascdc/9.4_3.5/proc/n0orwyj6rj0hq9n1bmsbozl1jgcw.htm

[zenenceladus]

Sorry if my need is unclear. I am not sure how to say this any other way. I created a ,xpt file in native English. I need to send it to a customer who wants the metadata and data to be in Japanese. How can I do the conversion.

[ChrisNZ]

Ok. Then you need to create your data sets using Japanese encoding. 
If your SAS session is already using this encoding then just create new tables and they'll have the correct encoding. Then export your tables.
To know the encoding run proc options option=encoding;run;

[SASKiwi]

Are you wanting to translate the text data stored in SAS datasets to Japanese? For example:

data want;
  MyData_English = 'Hello';
  MyData_Japanese = 'こんにちは'; * Kon'nichiwa;
run;

If so then SAS 9.4 has no functionality for this. You will need to use other tools like Google Translate for that and there is also a strong chance the translation won't be correct.