Time: always since 2.28 version update
Frequency: always since 2.28 version update
World name: Sargatanas
Character name: Shelke Rui
Class/level: White Mage/50
Party or solo: either way
Race: Miqo'te
In-game time: always
Area and coordinates: anywhere
Steps:

Set external keyboard type to Russian in PS4 Settings-Devices-External Keyboard, turn on Russian keyboard and dictionary in Settings-Languages.
Log on your character, try typing in russian by using any combination of left-ride side Ctrl, Alt, Shift, ~. Nothing works, input language stays english.

Tried typing in japanese, switched external keyboard type to Japanese in Settings-Devices-External Keyboard and turned on Japanese keyboard and dictionary in Settings-Language. Can switch from japanese to english and back with ~.
Can switch external keyboard from english to russian in other PS4 games and on PC version of Final Fantasy XIV with Alt+Shift, so the issue is in PS4 version of FF XIV not recognizing russian keyboard type. Virtual keyboard brought up by pressing triangle on gamepad is working fine, switches with Alt+Shift like it should, but its an inconvenient way of communication.
With version 2.2 i could type in russian on PS4 without any issues, by switching with Alt+Shift. With 2.25 Alt+Shift stopped working and switching was possible with ~. Since 2.28 neither works.

Please fix russian external keyboard usage in game back to Alt+Shift functionality. The problem is narrowed down to PS4 version of Final Fantasy XIV from 2.25 and on.

Connection Specs

Type of internet connection/provider: optic fiber 100 mbit/s
Modem maker/model number: Asus RT-N16

Model Number of the PlayStation 4 You Are Using
- Model Number: CUH-100BA/B01

Information About the Peripherals You Are Using
-Type: keyboard
-Maker: Microsoft
-Model Number: 1093