How Would You Optimize Your Webiste's Seo For Multiple Languages ?

mikaop said:

Let's Say you have a website in the pluming niche
you want to optimize your site for terms like :

In English

plumber in london
Pipe installation in London
Emergency Plumber in London

In Espagnole

fontanero en londres

Instalación de tuberías en Londres

Fontanero de emergencia en Londres

In Italian

idraulico a londra

Installazione di tubi a Londra

Idraulico di emergenza a Londra

How Would You Approach This ?

would you create subdomain or a subdirectory or none of them ? use the hreflang tags on each page or not ?
Please share your knowledge any small tip from your part may be good for me , thanks

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