As mentioned above, there are so many hybrids it is impossible to tell what something is without a name tag. If it is a species a person expert in those species might be able to identify it. Oncidium is one genus among a large number of closely related genera, all of which have been used to create hybrids.
Oncidiums are native only to the Americas, so it's likely it is a store-bought hybrid.
__________________ May the bridges I've burned light my way.