Are you saying Argonians and Khajiit are animals? That's extremely racist...what's wrong with you?
Snarky comments aside, the point is that they're not animals, it's not bestiality. They're simply humanoids with animal traits, which in-world are considered to (arguably) be equal to human. In-world, it's no different to standard race types, such as the Argonians being akin to Indians, or the Khajiit being akin to Chinese. That's all.
Out-of-world, they're still not animals, just animal-influenced. So basically, my answer is no. Not unless you're really digging deep for the claim.
Snarky comments aside, the point is that they're not animals, it's not bestiality. They're simply humanoids with animal traits, which in-world are considered to (arguably) be equal to human. In-world, it's no different to standard race types, such as the Argonians being akin to Indians, or the Khajiit being akin to Chinese. That's all.
Out-of-world, they're still not animals, just animal-influenced. So basically, my answer is no. Not unless you're really digging deep for the claim.