in French we have :

• une poignée (a handfull)
• une dizaine (around 10)
• une douzaine, quainzaine, vingtaine, etc... (around 12, 15, 20, etc ... )
• des centaines (many hundreds)
• des milles et des cents ( many thousands and hundreds )
• des millions et des millions (many millions)
• des centaines de millions (many hundreds of millions)
• you can change "millions" by milliard (billions) or else...
• we say also "des tonnes de" like "tons of" but in a broader sense than just weight measurement
• and probably a lot of other expressions I don't remember right now...

so it seems pretty close to the spanish usage...

in english I like the "gazillion" term, it's so exotic ;)