Translating build-in English in 7.1 into different language (Finnish) & changing the date order

Site URL: https://www.noitadigital.com

Hello everyone!

I'd need some build-in English translated. Can you recommend some ways to do this? Firstly I'm looking fro solutions for 7.1 sites, but also interested hearing how people have done it in 7.0 system. I manage few Finnish sites that have some build in-english words every here and there. Those sites that are in 7.0 and have language issues are on tempaltes: Rally, Horizon, York & Keene.

In Europe time & dates are usually in format DD MM YYYY, so I'd love to find a way to make dates also look "normal" for my Finnish eyes. So that date would be marked 18.6.2020 or 18. kesäkuu 2020.

I'm not a coder, but I'd love to learn to do this and I'm also interested studying coding to go further with Squarespace sites, but I'm not sure where to start.

Things I'd need to be translated are months, dates, "Read more"-buttons, "Previous", "Next" , "Search"

January & Jan. -> tammikuu
February & Feb. -> helmikuu
March & Mar. -> maaliskuu
April & Apr. -> huhtikuu
May -> toukokuu
June & Jun. -> kesäkuu
July & Jul. -> heinäkuu
August & Aug. -> elokuu
September & Sep. -> syyskuu
October & Oct. -> lokakuu
November & Nov. -> marraskuu
December & Dec. -> joulukuu

Monday & Mon -> maanantai & ma
Tuesday & Tue -> tiistai & ti
Wednesday & Web -> keskiviikko & ke
Thursday & Thu -> torstai & to
Friday & Fri -> perjantai & pe
Saturday & Sat -> lauantai & la
Sunday & Sun -> sunnuntai & su

Read more -> Lue lisää
Show less -> Näytä vähemmän
Previous -> Edellinen
Next -> Seuraava
Search -> Etsi

I'm also opening a webstore on my site soon-ish and I bet it's going to be also full of build-in english - I wonder that if I find a way to fix those language issues, could it make the store-side more vulnerable for security risks? 

Thanks!

Greetings from Finland! 🌿

Best wishes,
Kerttu