I love how your finger is in almost every shot 😆
How would you categorize a mountain?
I was always really confused when I came to Japan, because language doesn't translate so well, and in Japanese Yama = Mountain, but also Yama = hill, but noone knows the word hill. My wife told me when we first met that she lives up a mountain, I was very excited to see where she lived, some elevated suburb was not what I was expecting. People tell me they go "mountain climbing" when what they really mean is hiking.
Is it the same in Bulgaria, is it just "mountain" for everything just planina?
In English generally a mountain needs to be tall (600m+), steep, rugged, pointed etc. Not slightly elevated and round, that's for hills.