Si estás aprendiendo español, debes saber que la palabra hola no lleva tilde, el acento de esta palabra está en la sílaba ho pero no lleva tilde...por lo tanto no está bien escribir hóla. no se si en otro idioma exista la palabra hola con tilde. I will try to explain it in english! If you are learning Spanish, you should know that the word hello(hola) carries no accent mark, the accent(stressed syllable) of this word is on the ho syllable, but it has not accent mark...for that reason is not correct (is wrong) to write hóla. I don't know if in another language there is the word hola with accent mark. ;)

Hey, I've studied Spanish now almost 5 years in an advanced college setting, now if i'm not mistaken, some regions are more definite about their articles and accents, Spain is one of them, so, it's my guess that there's no proper way of spelling it, as long as you spell it in general. It definitely isn't something that would cause a language error

Entonces da igual cuando pones hola

Hola