Greek characters instead of "et al."

Question

Problem: In the final pdf document I get greek letters "k. sun." instead of "et al." when citing articles, for instance "Garris k. sun". instead of "Garris et al". This refers to the text corpus, not the bibliography. The bibliography at the end of the document is fine.
I am using an identical preamble to a colleague of mine with the difference that I use \usepackage[english,greek]{babel} because I need greek letters in my document. But I don't know what it has to do with the bibliography. I need to cite in APA style. For citing I use the \citep command.

Preamble:

\documentclass[10pt,twocolumn]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{geometry}
\usepackage[hidelinks]{hyperref}
\usepackage{apacite}
\usepackage{natbib}
\usepackage{graphicx}
\usepackage[english,greek]{babel}
\usepackage{amsmath}
\usepackage[compact]{titlesec}
\usepackage{appendix}
\geometry{a4paper, margin=1.6in}

...

\bibliography{prova}{}
\bibliographystyle{apacite}

...

Here an example from the bibliography:

@article{garris2002games,
  title={Games, motivation, and learning: A research and practice model},
  author={Garris, R. and Ahlers, R. and Driskell, J.E.},
  journal={Simulation \& gaming},
  volume={33},
  number={4},
  pages={441--467},
  year={2002},
  publisher={Sage Publications}
}

Here the result:

Answer 1

Just try to replace

\usepackage[english,greek]{babel}

with

\usepackage[greek,english]{babel}

But perhaps, if you just need to type some greek letters, why don't you type directly α, β, γ, &c. and compile with LuaLaTex ? You'll only have to use an opentype font that has greek letters — Latin Modern has.