We report the discovery of two transiting extrasolar planets from the HATSouth survey. HATS-11, a V=14.1 G0-star shows a periodic 12.9 mmag dip in its light curve every 3.6192 days and a radial velocity variation consistent with a Keplerian orbit. HATS-11 has a mass of 1.000 $pm$ 0.060 M$_{odot}$, a radius of 1.444 $pm$ 0.057 M$_{odot}$ and an effective temperature of 6060 $pm$ 150 K, while its companion is a 0.85 $pm$ 0.12 M$_J$, 1.510 $pm$ 0.078 R$_J$ planet in a circular orbit. HATS-12 shows a periodic 5.1 mmag flux decrease every 3.1428 days and Keplerian RV variations around a V=12.8 F-star. HATS-12 has a mass of 1.489 $pm$ 0.071 M$_{odot}$, a radius of 2.21 $pm$ 0.21 R$_{odot}$, and an effective temperature of 6408 $pm$ 75 K. For HATS-12, our measurements indicate that this is a 2.38 $pm$ 0.11 M$_J$, 1.35 $pm$ 0.17 R$_J$ planet in a circular orbit. Both host stars show sub-solar metallicity of -0.390 $pm$ 0.060 dex and -0.100 $pm$ 0.040 dex, respectively and are (slightly) evolved stars. In fact, HATS-11 is amongst the most metal-poor and, HATS-12 is amongst the most evolved stars hosting a hot Jupiter planet. Importantly, HATS-11 and HATS-12 have been observed in long cadence by Kepler as part of K2 campaign 7 (EPIC216414930 and EPIC218131080 respectively).
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