It is preferable firstly to contact the recipient of the legalised translation (university at which you wish to register, etc.) to find out what type of legalisation will be recognised. Some institutions ask for the translation to be recognised by the embassy of the country that awarded the diploma.
In the Canton of Vaud, there is no legalisation of translations as such, but a legalisation of signatures: the prefecture validates the signature of the notary who validates the signature of the translator. In general, foreign universities are content with this official stamp.
Other cantons, for example Geneva and Neuchâtel, have a system of sworn translators. These are certified translators who, when they take their oath, obtain the seal which allows them to legalise translations.
It is perfectly possible to have a Vaud document legalised in a different canton.