As a foreign proper noun, there is no consistent grammar across the Spanish world to deal with this. You will likely find that some people will say "los iPades" and others will say "los iPad".
iPad- proper nouns don't change in Spanish.
The plural of hamster in Spanish is: Los hámsters.
The plural form of "conductor" in Spanish is "conductores."
The plural of the Spanish word "lección" is "lecciones."
Jugando con el Ipad.
The plural of vive is viven.
The plural of "el sofá" in Spanish is "los sofás."
The plural of 'el día' in Spanish is 'los días.'
The plural of "pájaro" in Spanish is "pájaros." In Spanish, to form the plural of nouns that end in a vowel, you typically add an "s" to the end of the word. Therefore, "pájaro" becomes "pájaros."
Portals is the plural of portal
The plural of "bandera" is "banderas" in Spanish.
The plural form of "lion" in Spanish is "leones." In Spanish, most nouns ending in a consonant form their plural by adding "-es" to the singular form. In this case, "león" (lion) becomes "leones" in the plural form.