`-feefilter` should either be turned a debug option (whose help is not translated), or we should come up with a (translation) friendlier help message for the option:
https://github.com/bitcoin/bitcoin/blob/master/src/init.cpp#L322

Reported on transifex by yahoe.001.

fDebug = false;
    
    if (GetBoolArg("-debugnet", false))
        InitWarning(_("Unsupported argument -debugnet ignored, use -debug=net."));
    
    if (mapArgs.count("-socks"))
        return InitError(_("Unsupported argument -socks found. Setting SOCKS version isn't possible anymore, only SOCKS5 proxies are supported."));
    
    if (GetBoolArg("-tor", false))
        return InitError(_("Unsupported argument -tor found, use -onion."));
    if (GetBoolArg("-benchmark", false))
        InitWarning(_("Unsupported argument -benchmark ignored, use -debug=bench."));
    if (GetBoolArg("-whitelistalwaysrelay", false))
        InitWarning(_("Unsupported argument -whitelistalwaysrelay ignored, use -whitelistrelay and/or -whitelistforcerelay."));
    
    int ratio = std::min<int>(std::max<int>(GetArg("-checkmempool", chainparams.DefaultConsistencyChecks() ? 1 : 0), 0), 1000000);
    if (ratio != 0) {
        mempool.setSanityCheck(1.0 / ratio);
    }
    fCheckBlockIndex = GetBoolArg("-checkblockindex", chainparams.DefaultConsistencyChecks());
    fCheckpointsEnabled = GetBoolArg("-checkpoints", DEFAULT_CHECKPOINTS_ENABLED);
    
    int64_t nMempoolSizeMax = GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000;
    int64_t nMempoolSizeMin = GetArg("-limitdescendantsize", DEFAULT_DESCENDANT_SIZE_LIMIT) * 1000 * 40;
    if (nMempoolSizeMax < 0 || nMempoolSizeMax < nMempoolSizeMin)
        return InitError(strprintf(_("-maxmempool must be at least %d MB"), std::ceil(nMempoolSizeMin / 1000000.0)));
    
    nScriptCheckThreads = GetArg("-par", DEFAULT_SCRIPTCHECK_THREADS);
    if (nScriptCheckThreads <= 0)
        nScriptCheckThreads += GetNumCores();