Well you can merge the command \cvskill and the used command \grade in your linked question for a possibly solution.
Based on both you can add the following code into your preamble:
% <============================================================ new code
\renewcommand{\cvskill}[2]{%
\textcolor{emphasis}{\textbf{#1}}\hfill
\grade{#2}
}
\definecolor{frontColor}{rgb}{0.22,0.45,0.70}% light blue
\definecolor{backColor}{RGB}{200,200,200}% grey
\newcommand{\grade}[1]{%
\begin{tikzpicture}
\clip (1em-.4em,-.35em) rectangle (5em +.5em ,1em);
\foreach \x in {1,2,...,5}{
\path[{fill=backColor}] (\x em,0) circle (.35em);
}
\begin{scope}
\clip (1em-.4em,-.35em) rectangle (#1em +.5em ,1em);
\foreach \x in {1,2,...,5}{
\path[{fill=frontColor}] (\x em,0) circle (.35em);
}
\end{scope}
\end{tikzpicture}%
}
With the following complete code (MWE)
\documentclass[10pt,a4paper]{altacv}
%Layout
\geometry{left=1cm,right=9cm,marginparwidth=6.8cm,marginparsep=1.2cm,top=1.25cm,bottom=1.25cm,footskip=2\baselineskip}
%Packages
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[default]{lato}
\usepackage{CJKutf8}
\usepackage{hyperref}
%Colors
\definecolor{accent}{HTML}{000e17}
\definecolor{heading}{HTML}{000e17}
\definecolor{emphasis}{HTML}{696969}
\definecolor{body}{HTML}{01415f}
\colorlet{heading}{heading}
\colorlet{accent}{accent}
\colorlet{emphasis}{emphasis}
\colorlet{body}{body}
\renewcommand{\itemmarker}{{\small\textbullet}}
\renewcommand{\ratingmarker}{\faCircle}
% <============================================================ new code
\renewcommand{\cvskill}[2]{%
\textcolor{emphasis}{\textbf{#1}}\hfill
\grade{#2}
}
\definecolor{frontColor}{rgb}{0.22,0.45,0.70}% light blue
\definecolor{backColor}{RGB}{200,200,200}% grey
\newcommand{\grade}[1]{%
\begin{tikzpicture}
\clip (1em-.4em,-.35em) rectangle (5em +.5em ,1em);
\foreach \x in {1,2,...,5}{
\path[{fill=backColor}] (\x em,0) circle (.35em);
}
\begin{scope}
\clip (1em-.4em,-.35em) rectangle (#1em +.5em ,1em);
\foreach \x in {1,2,...,5}{
\path[{fill=frontColor}] (\x em,0) circle (.35em);
}
\end{scope}
\end{tikzpicture}%
}
\begin{document}
\cvsection[%
% page1sidebar % <================================== not needed for demo
]{Experience}
\cvevent{COO - Chief Operating Officer}{Evoleo Technologies, Lda}{April 2016 -- Ongoing}{Porto, Portugal}
\begin{itemize}
\item Operational management in the areas of development, production and logistics;
\end{itemize}
\divider
%
\cvsection{Languages}
\cvskill{English}{5}
\divider
\cvskill{Spanish}{4.5} % <==============================================
\divider
\cvskill{German}{3}
\end{document}
you get the result:

Please next time add the MWE to your question, do not use a link!