The Bayern Munich striker has a buyout clause in his contract which can see him leave this coming summer for €60m.
Kane will be 33 when he enters the final year of his Bayern deal next season.
"There's a lot of Tottenham fans including myself who would like to see Kane back," said Frank, ahead of a Carabao Cup tie against League One Doncaster.
"He's a top player. Personally, I don't think he will do it right now, if I'm honest, he'll probably stay in Bayern and continue performing well. He was top-scorer last year and won the championship, he's doing fantastic now.
"Top player. I don't know what he's thinking. Myself, I'm a traveller, I like to travel, I like to explore things as well. He's been here for many years so why not enjoy the time at Bayern a little bit more.
"But he's welcome. If he wants to join us, he's more than welcome."