Hi,
It's a bit confusing, so for the sake of future search queries, I leave here the full instructions, which worked for me.
1. In HANA Studio, go to the package where your views are located and add and activate a file named translation.hdbtextbundle. Just extension matters and you can leave the file empty.
2. Right-click the package to edit package properties. Fill in the following four fields:
Original Language=English,
Responsible= a db user name,
Terminology Domain = any two characters,
Text Collection = translation.hdbtextbundle
3. In Windows Explorer go to folder C:\Program Files\sap\hdbclient\rtt and edit the file rtt.properties in notepad. Fill in db settings:
# db settings
db.hostname=your.host.name
db.instance=00
db.user=hana db user
db.passwd= your password
4. In Windows Explorer go to folder C:\Program Files\sap\hdbclient and run cmd.exe
5. Optionally execute set JAVA_HOME=C:\Program Files (x86)\Java\jre1.8.0_45
6. Execute rtt --export -p your.package.name* -x C:\Users\yourusername\Documents\rtt_exports
7. If everything is ok, you'll end up with a bunch of .xlf files in the specified folder. E.g. 1.your.package.name.CA_YOURVIEW.calculationview.xlf
8. Rename the file by appending the desired target locale, e.g 1.your.package.name.CA_YOURVIEW.calculationview-tr_TR.xlf
9. Edit the xlf file in notepad. Add target-language attribute to the <file> tag. Example:
<file datatype="plaintext" original="your.package.name.CA_YOURVIEW.calculationview" source-language="en-US" target-language="tr-TR">
10. For each label that you want to translate, add <target> tag next to <source> tag. Example:<trans-unit xmlns:sap="urn:x-sap:sls-mlt" id="YOURATTRIBUTE" maxwidth="120" sap:sc="XCOL" size-unit="char">
<source>My original label</source>
<target>My translated label</target>
</trans-unit>
11. Save and execute rtt --import -p your.package.name* -x C:\Users\yourusername\Documents\rtt_exports
12. Verify in HANA Studio by running select * from _SYS_REPO.ACTIVE_CONTENT_TEXT_CONTENT
13. In HANA Studio set LOCALE user parameter for your HANA user. Then verify in reporting tools.
14. That's all! Very user-friendly, isn't it?
Thanks!
Andrey