There are many minor bugs, that should be good to repair

languages/english/lang_planet.inc -- two same variables {$l_planet_flauncherfailed3, $l_planet_autotradetype}
languages/english/lang_novabomb.inc -- many variables that are not used and never will be.
planet_owned/addtrade.inc -- missing lines for variables $l_tdr_createnew, $l_tdr_traderoute and $l_planet_tradehelp for planet_ownedaddtrade.tpl
spy.php -- missing line $template_object->assign("l_spy_confirm", $l_spy_confirm); for spy.tpl
autotrades.php -- line 79 $l_autotrade_energy shoud be $l_autotrade_power, same in lang_autotrade.inc, in lang file is two $l_autotrade_energy variables, but every of that contains other string
igb_loans.tpl -- line 26 contain string echo " that should be removed
sector_scan.tpl -- line 272 contain string "; -- same problem as igb_loans.tpl
probe_upgrades.php -- command scan is following after " elseif ($probeinfo['owner_id'] == $playerinfo['player_id'] && $probeinfo['owner_id'] > 0) ", but if I scan enemy probe, this eqality is bad for this. And scan command redirect you to main.php

Scan of ship is not completed, credits are always 0, bad energy to view, and devices are not listed anyone

ports/spacedock.inc and similar:
before use var $pmt_amt, should be $pmt_amt = $_POST["pmt_amt"]; -- particular bounty is not be able to pay without this

warpedit.php -- startsector should not be number in $template_object->assign("startsector", $shipinfo['sector_id']); -- should be name of sector, but there are missing db query for this. ($shipinfo['sector_name']) after db query to startsector variable

feedbackenter.tpl -- apostrofes to input values -- problems with strings in source code

In settings.php missing scheduler settings, but language strings are complete for it.

There are next hidden bugs, but I don't know them all