#ifdef LANG_RU_RU
#define LANGMASK(n) langmask[n]
const char hello[] PROGMEM = "Привет";
const char start_prompt[] PROGMEM = "<- Свайпни влево";
const char pomodoro[] PROGMEM = "Помидор";
const char set_time[] PROGMEM = "Установи время";
// Need to make it PROGMEM
const uint64_t langmask[] = {0xFF, 0x1FFF, 0xFF, 0xFFFF}; 
#else
#define LANGMASK(n) 0
const char hello[] PROGMEM = "Hello";
const char start_prompt[] PROGMEM = "<- Swipe left";
const char pomodoro[] PROGMEM = "Pomodoro";
const char set_time[] PROGMEM = "Set time";
#endif

const char* const strings[] = {hello, start_prompt, pomodoro, set_time};