As you will primarily be looking after children good references are essential. Ideally 2 written child care related references are required. These can be babysitting references.
If child care related references are not possible then employement or character references will have to suffice.
If you are able to obtain written references then it would be great if they are in the language of your target country otherwise English is fine.
Names and contact details of referees can also in some circumstances be sufficient.
References from immediate family members are not accepted.