fix translations path instructions

docs/standalone/index.md

@@ -134,7 +134,7 @@ The default CiviCRM language is US English (`en_US`). You can select a different
 
 Alternatively, if you need the web installer in another language you can manually download all the translation files now.
 
-Head to https://civicrm.org/download and choose "Internationalisation files" from the Download dropdown, then extract these in your `private/l10n` directory.
+Head to https://civicrm.org/download and choose "Internationalisation files" from the Download dropdown, then extract these into your `core` directory. The extracted files should end up in `core/l10n` and `core/sql`.
 
 
 ## Step 5. Configure MySQL {:#mysql}