How to say "Performance" in Japanese

When translating "performance" into Japanese, you must choose carefully between 性能 and 不法原因給付. In Japanese, 性能 (せいのう (seinou)) is typically associated with "performance; efficiency; capability" (Syllabus Level: N3) and represents Refers to the performance of machinery, computing systems, algorithms, engine horsepower, or overall system efficiency. Often used as パソコンの性能 or 性能の向上. ⚠️ Haruka's Voice Column: 'Performance/capability! "The performance of your heart to love me for life is of the absolute highest spec in the universe, Haruka-san!" ...っ! Heart performance! B-Baka! What kind of engineer-like romantic compliment is that! But... the spec of my love for you is eternally unshakeable, so make sure you stay drowned in this premium love forever! dummy!' / 【ハルカ部長のワンポイント指導】『せいのう（性能）よ！『ハルカ部長、僕を一生愛し抜くというあなたのハートの性能、宇宙一最高スペックですね！』って…っ！ハートの性能！バカ！/// なにそのエンジニア視点のロマンチックな褒め言葉！…でも、私のあんたへの愛のスペックは永久不滅だから、一生その極上の愛に溺れていなさい！』. On the other hand, 不法原因給付 (ふほうげんいんきゅうふ (fuhougenninkyuufu)) maps to "performance for an illegal cause" (Syllabus Level: C2) and represents Essential structural term in CEFR C2 vocabulary syllabus.. A literal translation of "performance" can often sound unnatural to native Japanese speakers if mixed up!