Owain added new scientific terms to the Welsh dictionary.

These include:

    “damcaniaeth dwysedd ffwythianolion” meaning “density functional theory”
    “brasamcan graddiant cyffredinol” which means a “general gradient approximation”
    “dull gwahaniaeth feidriadd” which translates as “finite difference method”

Which sort of disproves the hypothesis that 'Welsh Is a Language for Science'.