I cannot find this parameter in the documentation. It has been used in the template, source here

Minimal example
\documentclass[utf8,helvetica,narrow]{europecv}
\usepackage[T1]{fontenc}
\usepackage{graphicx} % Required to draw the logo
\usepackage[right=2.5cm]{geometry} % language table impossible otherwise
\begin{document}
\begin{europecv}
\ecvsection{Personal Skills}
\ecvmothertongue[0.5cm]{Finnish}\ecvlanguageheader{(*)}
\ecvlanguage[0.5cm]{Latvian} % TODO this parameter field is unknown to have Other languages like above
\ecvlanguage{English}{\ecvCOne}{\ecvCTwo}{\ecvCOne}{\ecvCOne}{\ecvCTwo}
\end{europecv}
\end{document}
How can you have other language(s) -field in Europecv?

\ecvlanguage? – Johannes_B Dec 24 '14 at 11:52\evclanguagenot working to provide other languases. Or do you have some idea how? – Léo Léopold Hertz 준영 Dec 24 '14 at 12:04\ecvlanguage[0.5cm]{Latvian} % TODO this parameter field is unknown to have Other languages like above. – Léo Léopold Hertz 준영 Dec 24 '14 at 13:44