It seems the strings in `qt/bitcoin.cpp` are not translated.

E.g. `qt/bitcoin-qt -lang=cz -datadir=/tmp/a2` gives me a warning in English that the datadir does not exist.

"notation for IPv6"),
QT_TRANSLATE_NOOP("bitcoin-core", ""
"Bind to given address to listen for JSON-RPC connections. Use [host]:port "
"notation for IPv6. This option can be specified multiple times (default: "
"bind to all interfaces)"),
QT_TRANSLATE_NOOP("bitcoin-core", ""
"Cannot obtain a lock on data directory %s. %s is probably already running."),
QT_TRANSLATE_NOOP("bitcoin-core", ""
"Connect only to the specified node(s); -noconnect or -connect=0 alone to "
"disable automatic connections"),
QT_TRANSLATE_NOOP("bitcoin-core", ""
"Create new files with system default permissions, instead of umask 077 (only "
"effective with disabled wallet functionality)"),
QT_TRANSLATE_NOOP("bitcoin-core", ""
"Delete all wallet transactions and only recover those parts of the "
"blockchain through -rescan on startup"),
QT_TRANSLATE_NOOP("bitcoin-core", ""
"Discover own IP addresses (default: 1 when listening and no -externalip or -"
"proxy)"),
QT_TRANSLATE_NOOP("bitcoin-core", ""
"Distributed under the MIT software license, see the accompanying file %s or "
"%s"),
QT_TRANSLATE_NOOP("bitcoin-core", ""
"Do not keep transactions in the mempool longer than <n> hours (default: %u)"),
QT_TRANSLATE_NOOP("bitcoin-core", ""
"Equivalent bytes per sigop in transactions for relay and mining (default: %u)"),
QT_TRANSLATE_NOOP("bitcoin-core", ""
"Error loading %s: You can't enable HD on a already existing non-HD wallet"),
QT_TRANSLATE_NOOP("bitcoin-core", ""
"Error reading %s! All keys read correctly, but transaction data or address "